Fastener for dust-collector bags



Feb.4 26, 1929. I 1,703,681

w. c. MILLER FASTENER FOR DUST COLLECTOR BAGS Filed Sept. 20, 1927 1I I+ 'Wfl/ao Patented Feb. 26, 1929.

UNITED STATES 1,703,681 PATENT oFFlcE.`

WARREN C. MILLER, 0F STERLINGTON, LOUISIANA, ASSIGNOR T0 THERIATOMIC' CARBON COMPANY, OF MONROE, LOUISIANA, A CORPORATION OF DELAWARE.

FASTENER FOR DUST-.COLLECTOR BAGS. f

Application area september 2o, 1927.' serial Ne. 220,729.

My inventionrelates to gas filters and particularly to fasteners for dust collecting bags.

In filtering gases containing small particles of solid matter it has heretofore been customary practice to pass the gases through a plurality of cloth bags. The bags retain the solid particles and permit the gases to pass therethrough. The .solid matter is collected and removed from the filter. An example of the use of such filtering mechanism is the removal of small particles of carbon from gases, as shown for example in the patent to Brownlee et al. No. 1,520,115, dated Dec. 23, 1924, although it is to be understood that the apparatus may be'used in connection with other types of apparatus and processes. The bags are subjected to vibration or periodic shaking for dislodging the separated particles of matter from the gases. Because of this vibratory movement, it is essential that the bases of the bags be securely fastened to prevent the leakage of gases. Heretofore the lower end of the bags have been clamped to nozzles by bolts, wing nuts, buckles and the like. When it is necessarv to replace the bags, such clamping means have had to be removed. As the clamping means become rusted, they are removed with difliculty and frequently fall into the accumula-l tion of particles of solid matter. For many purposes such foreign bodies interfere with subsequent treatment of the solid matter. Furthermore, the use of such clamping devicesrenders it necessary to have the filter out of service for a considerable length of time when the bags are changed.

I provide a quickly detachable securing means for the lowerend of the bag that is free from securing means that are liable to be, come rusted in place. A ring is disposed around the nozzle. The nozzle is provided with a radially projecting bead that is spaced -from'the ring a sufficient distance to permit the fabric of the bag to extend therebetween. However, the hem of the bag is of sufficient thickness to prevent its passing therebetween. The bag may be replaced by lift-ing the ring, passing the bag through the lifted ring and over the bead on the nozzle. Thereafter the ring is dropped for confining the hem of the ba 'he accompanying drawings illustrate the present preferred embodiment of my invention, n which,- U

iFigure a vvlew,partiallyk 111 elevation and partially in section, illustrating the fas`- I tener for a filtering bag; and Y Figure 2 is a view, partially in elevatio and partiallyl in section, of a gas filter em.

bodying my invention.

Referring to Figure 1, the lower end of a filtering bag 2 is provided with a hem 3 confined between a clamping ring 4 and an external wall of a nozzle 5. A cord, rope, or a hoop 6, may be inserted Within the loop of the hem 3, if desired, the circumference of which is suliicicnt to slip over the outer end of the nozzle 5. The nozzle 5 is provided with a circumferentially extending bead 8 that cooperates with the inner surface of the ring 4 and. a b'ase 9 for defining a chamber 10. The ring 4 is provided with handles 11. The ring 4 rests upon the base 9 and is free from securing bolts, wing nuts, buckles andthe likef 1When it is desired to move the bag 2, the operator grasps the handles 11 and lifts the ring 4 above the top of the bead 8. The bag 2 is then withdrawn from engagement with the bead 8 and the ring 4. Thereafter a new bag 2 is passed through the elevated ring 4 and over the bead 8 with the hem 3 extending below the lower face of the latter. The ring 4 is then lowered and confines the hem 3 within the chamber 10. Vithdrawal of the bag 2 from engagelnent with the nozzle 5 is prevented by engagement of the hem 3 with the lower edge of the bead 8 and the inner face of the ring 9. Then a piece of twine 6 or a hoop is inserted in the hem 3, the clamping action is veryl'efi'ective. The bag 2 adjusts itself as to length, since the hem 3 is suspended in the chamber 10. The bagis then drawn against the bead 8 sufficiently to allow the bag to be vibrated or shaken.

With the foregoing construction a filtering bag 2 maybe changed very quickly and without danger of losing clamping nuts, n bolts, buckles and the like; also the amount of time required in making such changes is small as compared to the time required for loosening a. plurality of fastening devices that might become rusted in use.

Referring to Figure 2, a plurality of bags 2 are suspended from supports 14 provided with mechanisms 15 for imparting vibratory take-0H conduit 20 is connected at the upper ends of the chamber 16. A conveyor 21 is provided for removing the particles of solid matter/as they accumulate in the conduit 18. The compartments 16 may be shut 0E from the conduits 18 and 20 by valves, not shown.

Gases laden With particles of solid matter are introduced into the chamber 17 from any .source and are brought to a predetermined temperature. The gases then pass upward through the several funnels 19, through, the interstices of the bags 2 and thence into the conduit 20. The particles of solid matter collected in thebags 2 are freed from the bag walls by the vibratory or shaking movement and the particles of solid matter fall downwardly into the conduit'18 from whichthey are removed by the conveyor 2l. One application of this invention is the removal of par- While I have described a preferred em-' bodiment vof lny invention, it Will be understood that it is not `limited to such form but may be otherwise embodied Without departing from the scope of the following claims.

I claim: y

1. In combination a filtering fabric, a nozzle having a radially exten ing lbead ,and means for securingv the filtering fabric to the nozzle comprising a loosely mounted ring in spaced relation to the face of the bead.

2. In combination, a fabric filter, a'nozzle rif/canal having a radially extending bead and means for securing the filter to the nozzle comprising a loose ring movable longitudinally of the nozzle and in spaced relation thereto.

3. In a securing device for a thin body having a thickened end portion, a base, a tubular member extending upwardly therefrom, and having a re-entrant portion in one of its faces for the rece tion of the thickened end portion, and. a oosely mounted ring for closing the re-entrant portion.

4. In combination, a base, a tubular member extending therefrom and having a reentrant surface along one of its faces, a ilexible member having a thickened end portion extending past the end of the tubular member remote from the base and a ring co-operating with the tubular member and flexible member, the ring being spaced from the portion of the.I tubular` member of maximum radial dimension a sufficient distance to permit the passage of the flexible member over the remote end of the tubular member but to prevent the passage of the thickened portion.4

5. In combination, a base, a tubular member extending therefrom and having a re-entrant surface along one of its faces, a fabric filter having a thickened end portion extending past the end of the tubular member remote from the base, filling means in the thickened end portion, and a ring cooperating With the tubular member and filter, the ring being spaced from the portion of the tubular member of maximum radial dimension a distance sulicient to permit the passage of the filter over the remote end of the tubular member but preventing the passage of the thickened end portion and filling means.

,In testimony whereof I have hereunto set my hand.

WARREN C. MILLER. 

